Vapor and fume controlling system.



G. A. PENNUCK.

VAPOR AND FUME CONTROLLING SYSTEM. APPLICATION FILED Aue.16,1916.

Patentfid Jan. 29, 1918.

ononen ALGEn rEnnocK, or OAK PARK, ILLINOIS, assronon To wnsTEnn ELECTRIC COMPANY, TncOnronATEn, or new YORK, n. Y A oonronATIon or NEW YORK varor, AND run/tn CONTROLLING sYsTEM.

menace.

Specification of Letters Patent.

Application filed August 16, 1 .916. Serial No. 115,207.

To all whom it may concern."

Be it known that l[, GEORGE ALGER PEN- Noon, a citizen of the United States, residing at Oak Park, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Vapdr and Fume Controlling Systems, of which the following is a full, clear. concise and exact description. I.

This invention relates to a vapor and fume controlling system, and more particularly' to a system of this kind in which the vapor or fume emitting substances are kept.

in open containers such as are used in metal cleaning and plating processes. The object of the invention, is to provide a system whereby the vapors or fumes which rise from open containers will be directed into a fume exhaust and will not be dissipated in the room in which the containers are located.

Inthe commercial treatment of metals for the application of finishes large heavy containers, tanks, or vats are utilized and in these tanks are placed the'liquids which are used in the finishing processes. A large variety of fume or vapor emitting liquids are used for this purpose, such hot water or fuming acids, and since it is not feasible to cover the tanks, as it is necessary to continually change the metalparts which are being finished from one tank to another, the

fumes rising from these various tanks escape into the room. When the fumes from a plurality of such tanks are allowed to escape into the room. the room atmosphere very soon becomes saturated therewith. Such an atmosphere is necessarily danger-1 ous to the health of the operators and should be avoided.

According to this invention, the fumes which rise from the tanks or containers are blown across the surface of the liquidin the tank by air which is emitted from a nozzle which extends along the upper edge of one side of said tank. This blast of air together with an air exhaust connected to a funnel-shaped hood mounted 'on the upper edge of the opposite side of the tank will force all the fumes rising from said tank into the hood from where the fumes can be readily conveyed to a stack exhaust. Thus it will be evident that by the use of this systerm the atmosphere in a metal finishing room may be maintained clear of fumes.

The invention is illustrated in the accompanylng drawings 1n which:

Figure 1 1s a: front elevatiormof a pair Patented Ja 2 MM of finishing tanks with the associated pipe connections used for exhausting the fumes;

Fig. 2 is a section on the line 2-:2 of Fig. 1, looking in the direction of the arrows, and illustrates the path of the air currents in the exhaust system.

In the preferred embodimentof the invention, as illustrated in the drawings, a plurality of tanks, such as 3 and 4, in which the finishing fluids are contained are mounted in a series of rows in the finishing room. These tanks contain various solutions, such as hot water, fuming acids, caustic solutions, etc., which are used for cleaning the parts operated on and likewise to obtain the particular finish desired on said parts. To clean iron or steel articles alkaline solutions are used which serve to remove all traces of grease from these parts. In the treatment of iron and steel parts they are generally first immersed in asolution of hot caustic to remove the grease. after which they are rinsed in cold water to remove all traces of the caustic.

Following this the parts are dipped in a solution of acid for plating solution which will give the finish desired. When the parts have been plated they are once more washed in cold water which removes all traces of the plating so lution, after which they are again rinsed in hot water which facilitates drying. In the treatment of brass, copper, or other similar parts for the purpose of cleaning and plating differentsolutions are used. In this recess the parts are first cleaned by dipping in a hot solution of caustic. after which they. are rinsed in cold water. Following this the parts are dipped in a cyanid solution for additional cleaning, such as taking 0% scale, etc, after which they are again rinsed in cold water to remove all traces of the cyanid. The parts may then be finished by plating in a warm solution fumes rising therefrom be controlled so. that a they will not be dissipated in the atmosphere of the plating or finishing room. Connected to the rear end of each one of these tanks is a funnel-shaped exhaust hood 5., the lower end of which extends well into the liquid' contained in the tank and the upper end of which protrudes several inches above the top surface of the tank so that the fumes escaping from the tank will readily be directed into the hood. The hood 5 ex-v tends along the entire rear edge of the tank and is connected to an exhaust pipe such as 6 which connects with the common exhaust pipe 7 leading to the fan 8. The fan 8 ma Y be of any standard suction producing typie and is connected to the stack exhaust pipe 9, into which the air drawn'through the hoods 5, the risers 6, and the common exhaust pipe 7 is forced bymeans of the revolving blades of the fan. Connected to the stack exhaust pipe 9 is the blast supply pipe 10 whichterminates in the header or feed pipe 11.

- from which a series of risers, such as 12, are

.tapped. Each of t ese risersis connected to a nozzle 14 which extends along the front edge of the tank and through which a blast of air is blown across the top surface of the tank.

In the operation of'the system the revolving blades of the fan 8 will create a-suction in the exhaust pipe 6. This will draw air into the hood 5 which will be conducted through the riser 6 and the common exhaust pipe 7 by the fan and into the stack exhaust 9. All of the air drawn into the stfik ex? haust by the fan will not be fed to the stack due to the pipe 10 which acts as a shunt or by-pass, and by virtue of which a small portion of the air in the stack supply pipe 9 willbe fed through the riser 12 to the nozzle 14. IIhis air shunted out of the stack sup ply pipe 9 will create a blast through the nozzle 14 which will blow across the. surface of the liquid contained in the tank andwill,

- fumes rising from the liquid in combination with the suction created by the fan through the hood 5, gather up the and force them into the exhaust pipe 6. The direction of the circulating air currents is indicated in Fig. 2 by means of arrows. It will be evident from an inspection of this figurethat when the airis circulating t1 rough the system, as shown by the arrows, the fumes rising from the tank will not be permitted to rise very far above the surface of the liquid and will not bepermitted to escape into the room, since the fan 8 creates a blast and suction across the surface of the liquid which assist one another in gathering the fumes into the hood 5.

Obviously the preferred form of the invention herein described is capable of many variations and applications without departing from its spirit and scope.

rnentioned means and drawn into said exha-nst means said stream of air carrying the escaping fumes into said exhaust means.

2. In a vapor or fume controlling system, the combination with a container, of a nozzle extending along the upper edge of one side of said container, a funnel-shaped exhaust hood mounted on and extending along the opposite side of said container, a fan, a pipe connecting said hood and said fan, and a blast supply pipe connecting said nozzle and said fan, whereby the fumes rising from said container will be controlled by the combined blast and suction and forced into said hood.

3. In a vapor or fume controlling system,

the combination with a container, of an exhaust-hood extending along the upper edge of one side of said container, an exhaust means including a fan connected to said hood, a stack exhaust pipe terminating at said fan, a blast nozzle extending along the upper edge of the opposite side of said container, a blast supply means interconnecting said stack exhaust and said nozzle, said fan forcing a part of the air from the stack exhaust through said nozzle which in combination with the air drawn. into the hood by said fan will force the fumes rising from said container into said stack exhaust.

In witness whereof, I hereunto subscribe my name this 8 day of Aug. A. D., 1916.

GEORGE ALGER PENNOCKH 

